The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 1987
Filed:
Apr. 18, 1985
Mitsuhiro Takasaki, Yokohama, JP;
Hiroya Murakami, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A punching method and apparatus for forming through holes by punching in a ceramic green sheet for use as a material of a laminated substrate. Not only the positioning of the work but also the driving of the upper die set are conducted by of servomotors with the speed and timing of operation of the servomotors being controlled in accordance with a prestored program in a microcomputer, so as to attain a high speed and efficiency of operation. In addition, a hole clearing operation is conducted immediately after the punching so that the chip remaining in the punched through hole, if any, is forced out from the through hole by the same punch used in the punching operation.